We describe a patient with acute promyelocytic leukemia (APL) who was
successfully induced into remission with all-trans retinoic acid (ATRA
) and idarubicin, but developed myelodysplastic syndrome (MDS) with mo
nosomy 7 shortly after conclusion of maintenance therapy with idarubic
in alternating with 6-mercaptopurine, vincristine, methotrexate and pr
ednisone. Patients on combination regimens of ATRA or other retinoids
and chemotherapy, which are being increasingly used in recent years, s
hould be closely monitored for the development of potentially new comp
lications including MDS.